句型：

It is time for sb. to do sth　 "到……時(shí)間了"　 "該……了"

It is time sb. did sth. "時(shí)間已遲了"　 "早該……了"

It is time for you to go to bed.　 你該睡覺了。

It is time you went to bed.　　　你早該睡覺了。

would (had) rather sb. did sth.　表示'寧愿某人做某事'

I'd rather you came tomorrow.

wish, wonder, think, hope 等用過去時(shí)，作試探性的詢問、請求、建議等。

I thought you might have some. 我以為你想要一些。

比較：

一般過去時(shí)表示的動(dòng)作或狀態(tài)都已成為過去，現(xiàn)已不復(fù)存在。

Christine was an invalid all her life.

(含義：她已不在人間。)

Christine has been an invalid all her life.

(含義：她現(xiàn)在還活著)

Mrs. Darby lived in Kentucky for seven years.

(含義：達(dá)比太太已不再住在肯塔基州。)

Mrs. Darby has lived in Kentucky for seven years.

( 含義：現(xiàn)在還住在肯塔基州，有可能指剛離去)

注意： 用過去時(shí)表示現(xiàn)在，表示委婉語氣。

動(dòng)詞want, hope, wonder, think, intend 等。

Did you want anything else?

I wondered if you could help me.

2)情態(tài)動(dòng)詞 could, would.

Could you lend me your bike?

used to / be used to

used to + do："過去常常"表示過去習(xí)慣性的動(dòng)作或狀態(tài)，但如今已不存在。

Mother used not to be so forgetful.

Scarf used to take a walk.　 (過去常常散步)

be used to + doing： 對……已感到習(xí)慣，或"習(xí)慣于"，to是介詞，后需加名詞或動(dòng)名詞。

He is used to a vegetarian diet.

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